openai/gpt-chat-latest → B (3:2)

Side B fixes a concrete production reliability issue by requiring OAuth when credentials are configured, adding automatic token refresh/retry on 401/403, returning structured auth-rejection outcomes instead of failing generically, and improving error handling with focused diagnostics. Side A meaningfully refines the pair-selection heuristic (component attachment priorities and rank-adjacent refinement with tests), but it is primarily an algorithmic preference change, whereas Side B prevents fetch failures caused by Reddit's API behavior and hardens a critical integration.